多項(xiàng)選擇題A national retail chain needs to design an IP addressing scheme to support a nationwide network. The company needs a minimum of 300 sub-networks and a maximum of 50 host addresses per subnet. Working with only one Class B address, which of the following subnet masks will support an appropriate addressing scheme?（）

A.255.255.255.0
B.255.255.255.128
C.255.255.252.0
D.255.255.255.224
E.255.255.255.192
F.255.255.248.0


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1.多項(xiàng)選擇題Which three are characteristics of an IPV6 anycast address?（）

A.any-to-many communication model
B.delivery of packets to the group interface that is closest to the sending device
C.one-to-many communication model
D.the same address for multiple devices in the group
E.one-to-nearest communication model
F.a unique IPV6 address for each device in the group

2.單項(xiàng)選擇題Which option is a valid IPv6 address?（）

A.2001：0000：130F：：099a：：12a
B.2002：7654：A1AD：61：81AF：CCC1
C.FEC0：ABCD：WXYZ：0067：：2A4
D.2004：1：25A4：886F：：1

3.單項(xiàng)選擇題

Refer to the exhibit. In this VLSM addressing scheme, what summary address would be sent from routerA?（）

A.172.16.0.0/16
B.172.16.0.0/20
C.172.16.0.0/24
D.172.32.0.0/16
E.172.32.0.0/17
F.172.64.0.0/16

4.多項(xiàng)選擇題Which three approaches can be used while migrating from an IPV4 addressing scheme to an IPV6 scheme?（）

A.statically map IPV4 address to IPV6 addresses
B.configuration IPv4 tunnels between IPV6 islands
C.use DHCPv6 to map IPV4 addresses to IPV6 addresses
D.use proxying and translation to translate IPV6 packets into IPV4 packets
E.configure IPV6 directly
F.enable dual-stack routing

6.單項(xiàng)選擇題Which subnet mask would be appropriate for a network address range to be subnetted for up to eight LANs, with each LAN containing 5 to 26 hosts?（）

A.0.0.0.240
B.255.255.255.252
C.255.255.255.0
D.255.255.255.224
E.255.255.255.240

7.單項(xiàng)選擇題An administrator must assign static IP addresses to the servers in a network.For network 192.168.20.24/29, the router is assigned the first usable host address while the sales server is given the last usable host address. Which of the following should be entered into the IP propertied box for the sales server?（）

A.IP address:192.168.20.14 Subnet Mask:255.255.255.248 Default Gateway:192.168.20.9
B.IP address:192.168.20.254 Subnet Mask:255.255.255.0 Default Gateway:192.168.20.1
C.IP address:192.168.20.30 Subnet Mask:255.255.255.248 Default Gateway:192.168.20.25
D.IP address:192.168.20.30 Subnet Mask:255.255.255.240 Default Gateway:192.168.20.17
E.IP address:192.168.20.30 Subnet Mask:255.255.255.240 Default Gateway:192.168.20.25

8.多項(xiàng)選擇題the network administrator has been asked to give reasons for moving from ipv4 to ipv6. what are two valid reasons for adopting ipv6 over ipv4?（）

A.telnet access does not require a password
B.nat
C.no broadcast
D.chanage of destination address in the ipv6 header
E.chanage of source address in the ipv6 header
F.autoconfiguration

9.多項(xiàng)選擇題the network administrator has been asked to give reasons for moving from ipv4 to ipv6. what are two valid reasons for adopting ipv6 over ipv4?（）

A.telnet access does not require a password
B.nat
C.no broadcast
D.chanage of destination address in the ipv6 header
E.chanage of source address in the ipv6 header
F.autoconfiguration

10.多項(xiàng)選擇題Which two statements describe characteristics of IPv6 unicast addressing?（）

A.Global addresses start with 2000::/3.
B.Link-local addresses start with FE00:/12.
C.Link-local addresses start with FF00::/10.
D.There is only one loopback address and it is ::1.
E.If a global address is assigned to an interface, then that is the only allowable address for the interface.